#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int msPer;

int playNote(char i)
{
    int freq;
    switch(i)
    {
    case '0':
	freq = 247;
	break;
    case '1':
	freq = 262;
	break;
    case '2':
	freq = 294;
	break;
    case '3':
	freq = 330;
	break;
    case '4':
	freq = 349;
	break;
    case '5':
	freq = 392;
	break;
    case '6':
	freq = 440;
	break;
    case '7':
	freq = 494;
	break;
    case '8':
	freq = 523;
	break;
    case '9':
	freq = 587;
	break;
    default:
	return 0;
	break;
    }

    char* command = malloc(256);
    sprintf(command, "beep -f %d -l %d", freq, msPer);
    int retval = system(command);
    free(command);
    return retval;
}

int eq(char* b1, char* b2)
{
    int i;
    if (strlen(b1) != strlen(b2))
	return 0;
    for (i = 0; i < strlen(b1); i++)
	if (b1[i] != b2[i])
	    return 0;
    return 1;
}

int main(int argc, char** argv)
{
    msPer = 200;
    if (argc > 1)
    {
	if (eq(argv[1], "--help"))
	{
	    printf("Usage: beepi <length per note in ms>\n");
	    return 0;
	}
	msPer = atoi(argv[1]);
    }	
    FILE* fp;
    fp = fopen("pi.txt", "r");
    int sz;
    fseek(fp, 0L, SEEK_END);
    sz = ftell(fp);
    fseek(fp, 0L, SEEK_SET);
    char* buffer = malloc(100000);
    fread(buffer, sz, 1, fp);
    fclose(fp);
    int i;
    for (i = 0; i < strlen(buffer); i++)
	if (playNote(buffer[i]))
	    return 0;
    
}